The chief Parcel Office is at Mount Pleasant, Clerkenwell. It is a district rich in historical associations. Here was the famous Bagnigge Wells, where Londoners used to stroll on summer evenings to drink a dish of tea and to enjoy the humours and fashions of the town. Here also stood the Coldbath Fields Prison, and gradually, as buildings surrounded the jail, the district lost prestige as a health resort. The prison authorities doubtless realised this, and decided to seek purer air for their 2000 visitors, and they removed their headquarters further into the country. The prison was thus thrown on the market, and after a period of negotiations the General Post Office took possession with the intention of erecting a pile of Government buildings on the site. The Parcel Post had rapidly outgrown its cramped quarters at St. Martin's le Grand, and in 1887 the business was transferred to the prison buildings. For some years the chief Parcel Sorting Office in Great Britain was located in the old prison treadwheel house behind massive and gloomy walls. The khaki-clad, barefaced gentry had departed to their country residence, and the huge treadwheels had been removed to make way for the Parcel Post. But the prison was very quickly demolished and gave way to a handsome Sorting Office, the floor space of which when completed was to cover two acres. The Parcel Post took possession of the new building in October 1892. It is always difficult to transact any business in a building constructed for quite another purpose, and the conditions of service in the prison buildings had not been exactly comfortable. Spacious yards surround the Post Office buildings, and in these yards platforms have been built giving direct access to the Sorting Office. Post Office vans arrive in one yard loaded with receptacles containing parcels collected from post offices in the City and other parts of London, or sent up from the provinces and brought here from the railway termini. The loads are discharged on to the platform and conveyed by porters into the Sorting Office. In another yard on the opposite side of the building other vans arrive empty, and back up to the platform to receive their loads of parcels for conveyance to other parts of London or to railway stations for despatch to provincial towns.